| NO. |
Title |
Presented at
&
Date |
Author |
Project Team / Research Division |
| Abstract |
| 11250 |
Delineation of gas hydrate-bearing sediments by multi
seismic attributes using 3D seismic survey in the eastern
Nankai Trough area |
8th Society of Exploration Geophysicists of Japan International
Symposium
2006/11/26-28 |
Takao Inamori, Tatsuo Saeki(Japan Oil, Gas and Metals
National Corporation) |
Methane Hydrate Research Project Team |
[Abstract] Bottom Simulating Reflectors (BSRs)
were widely found on the marine seismic data acquired
offshore Japan, especially in the shelf slope around the
eastern Nankai Trough area since 1970’s (for example,
Aoki et al., 1983; Shimizu and Tanaka, 2002).
In 2000, the occurrence of gas hydrates was confirmed
by core and borehole log data In the eastern Nankai Trough
area. It gave us so big impact to the view of Japanese
future energy resources and other scientific interests.
METI, Ministry of Economy, Trade and Industry of JAPAN,
started ‘Japan’s Methane Hydrate Exploration Program’
since the autumn of 2001.
METI conducted the 3D seismic survey in this area in 2002
and decided well sites and drilled thirty-two boreholes
in 2004. Several logs and cores showed the occurrence
of gas hydrate. There are several wells found over 30
m gas hydrate-bearing sediments in the eastern Nankai
Trough area. We have found the relationship between the
occurrence of gas hydrates and BSRs is complicated and
the gas hydrate-bearing sediments are inhomogeneous. Gas
hydrates are included in the pore-space sediments bearing
the sand layer of turbidite channel or lobe mainly.
When we will explore and exploit the gas hydrate, we have
to get the information of gas hydrate-bearing sediments,
such as its saturation, porosity or their thickness. BSRs
indicate the existence of gas hydrates. However, we cannot
estimate detail reservoir information from BSRs distribution.
To estimate the amount of gas hydrates accurately, we
need to get the more detailed reservoir parameters from
seismic data.
We apply the seismic attributes analysis to 3D seismic
survey data to delineate hydrate-bearing sediments.
We calculate seismic attributes of the P-interval velocity
using the dense NMO velocity analysis, P-impedance, S-impedance,
and Poisson’s ratio change from pre-stack (AVO) analysis
and the attenuation from post-stack analysis. And we delineate
of gas hydrate bearing-zones at borehole locations. High
P-interval velocity, High P & S impedance, low Poisson’s
ratio and high-attenuated layers correspond to the hydrate
bearing-zones.
We propose the model of gas hydrate-bearing sediments
from the analysis of the seismic attributes analysis. |
|
|
| 11247 |
Development a Highly-Active DME Steam Reforming Catalyst
for Fuel Cell |
2006 Fuel Cell Seminar
2006/11/14-17 |
Tetsuya Takemoto, Susumu Takami(Osaka Gas), Kenji Nakamura,
Kengo Tsukahara(Mitsubishi Gas Chemical), Shinichi Suzuki(Japan
Oil, Gas and Metals National Corporation) |
Research Project Team on Emerging Gas Technologies |
| [Abstract] Development a Highly-Active DME
Steam Reforming Catalyst for Fuel Cell |
|
|
| 11246 |
Development of DME Autothermal Reforming System for
Fuel Cell vehicles |
2006 Fuel Cell Seminar
2006/11/14-17 |
Naohiko Matsuda(Mitsubishi Heavy Industries), Shinichi
Suzuki(Japan Oil, Gas and Metals National Corporation) |
Research Project Team on Emerging Gas Technologies |
| [Abstract] Development of DME Autothermal
Reforming System for Fuel Cell vehicles |
|
|
| 11244 |
Research study for Microbial Restoration of Methane
Deposit with Subsurface CO2 Sequestration into Depleted
Gas/Oil Fields |
SPE Asia Pacific Oil & Gas Conference and Exhibition
2006/11/11-13 |
Haruo Maeda(Teikoku Oil), Kazuhiro Fujiwara(Chugai Technos), Komei
Okatsu(Japan Oil, Gas and Metals National Corporation) |
Petroleum Engineering Research Team |
[Abstract] Natural gas (methane) is an environmentally
excellent form of energy and also one of the most desired
energy sources in comparison with the other fossil fuels.
On the other hand, the subsurface CO2 disposal and storage
technologies could become a “must” in the course of the
next century in order to reduce the emissions of green
house gases into the atmosphere.
This paper presents the result of applicability investigation
for microbial restoration of methane deposit using subsurface
sequestered CO2 and indigenous microbes in the depleted
oil and gas fields in Japan. The important factors are
efficiency and velocity of methane generation by indigenous
microbes. Fluid samples (producing oil and water) from
3 gas and 2 oil fields in Japan were collected and analyzed
in order to find out that the indigenous methane and hydrogen
generating microbes were existing under severe (high temperature
and high pressure) reservoir conditions. As a result of
detail PCR-DGGE and Real Time PCR quantitative analysis,
in the samples from two depleted oil fields, very active
and high concentrated methane and hydrogen generating
microbes were detected. After getting these positive evidence,
methane generating experiments were carried out using
glucose as a carbon source to estimate the ability of
microbial methane generation both in cylinder bottle and
core holder (setting berea core inside the holder) under
reservoir conditions (5MPa,70 C)). These results indicate
that the microbial methane generating efficiency is more
dominant in the porous media (suggest active microbes
are adsorbed on the surface of rock pore) than in a pool
condition (means active microbes are flowing in the water).
Judging from these research results, depleted oil reservoir
has a possibility to become good candidates as subsurface
microbial reactors to convert injected CO2 into methane
by using indigenous microbes if suitable and economical
carbon source is available. |
|
|
| 11243 |
Direct Synthesis of Dimethyl Ether from Synthesis Gas |
8th International Symposium on Biotechnology, Metal
Complexes, and Catalysis
(BMC-VIII)
2006/11/6 |
Kaoru Takeishi(Shizuoka Univ.) |
Research Project Team on Emerging Gas Technologies |
| [Abstract] Copper alumina catalysts prepared
by a sol-gel method that is appropriate for DME steam
reforming are applied for the DME direct synthesis (3H2
+ 3CO → CH3OCH3 + 2CO2) that is similar reaction of DME
steam reforming (CH3OCH3 + 3H2O → 3H2 + 2CO2). Much amount
of DME was produced over Cu-Zn(36-4wt.%)/Al2O3 catalyst
prepared by the sol-gel method, at 250 ℃ and the lower
reaction temperature. The less amount of DME was produced
over the mixed catalyst of the methanol synthesis catalyst
(N211) and the methanol dehydration catalyst (BK-105),
at 310 ℃ and the higher reaction temperature. The single
type catalyst that has copper sites for methanol synthesis
and alumina sites for methanol dehydration on the surface
is more appropriate and more excellent for DME direct
synthesis than the mixed catalyst that is one of the patent
catalysts for DME direct synthesis. |
|
|
| 11240 |
Hydrogen production by steam reforming of dimethyl ether
over single type copper alumina catalysts |
3rd Asian DME Conference
2006/10/19 |
Kaoru Takeishi(Shizuoka Univ.) |
Research Project Team on Emerging Gas Technologies |
[Abstract] It is expected that fuel cell
is one of the methods for restraint of the global green
effect. Dimethyl ether (DME) dose not contain the poisonous
substances, and it burns with no particulate matters (PM),
no SOx, and less NOx. DME is expected as a clean fuel
of the next generation. DME is able to take the place
of light oil and LPG, and its physical properties are
similar to those of LPG. There is possibility that DME
infrastructures will be settled more rapidly than those
of hydrogen and methanol, because LPG infrastructures
existing are able to use for DME. Then, we have been studying
on steam reforming of DME for the hydrogen production.
The results of steam reforming of DME over several catalysts
suggested following facts. H2 production with steam reforming
of DME consists of two steps. The first step is hydrolysis
of DME into methanol. The second step is steam reforming
of methanol that produces H2 and CO2. The rate determining
step is hydrolysis of DME into methanol. The copper alumina
catalysts prepared by the sol-gel method are excellent
for H2 production by steam reforming of DME. The reason
is that  -Al2O3
for the hydrolysis and Cu for methanol-steam reforming
are co-existing closely on the catalyst surface. The consecutive
reactions smoothly occur. Addition of Zn, Mn, or Fe into
Cu(30wt.%)/Al2O3 activates steam reforming of DME. The
Cu-Zn(29-1wt.%)/Al2O3 catalyst showed the excellent activity
of DME steam reforming; the DME conversion was 95%, H2
yield was 95%, and CO concentration was 0.8 mol.%. We
have developed a new catalyst for H2 production from DME,
and the catalyst give us a great potential for H2 supply
from DME. |
|
|
| 11238 |
Time-Lapse Seismic Survey in the Oil Sands Area |
8th SEGJ International Symposium
2006/11/26-28 |
Toru Nakayama, Akihisa Takahashi(JAPEX), Hisako Mochinaga(Japan
Oil, Gas and Metals National Corporation) |
Geology & Geophysics Research Team |
[Abstract] Time-lapse 3D seismic survey was
conducted in the Japan Canada Oil Sands Limited (JACOS)
Hangingstone steam-assisted gravity drainage (SAGD) operation
area, Alberta, Canada. The objectives of the time-lapse
survey were to delineate steam chambers and monitor their
growth. A seismic modeling study based on well logs was
also carried out to predict the changes in seismic response
of the oil sands reservoir due to steam injection.
The results of our seismic modeling indicate that the
change of the reservoir P-wave velocity due to the steam
injection is seismically detectable, and our time-lapse
seismic data was consistent with the seismic modeling.
The time lapse seismic monitoring is expected to help
better understanding of the heterogeneity of the reservoir sands
by integrating the information of the steam chamber geometry
and the seismic response analysis. |
|
|
| 11232 |
Understandings of seafloor manifestations utilized by
3D seismic data around the Tenryu knolls in the Nanki
Trough |
5th International Workshop on Methane Hydrate Research
and Development
2006/10/9-12 |
Sadao Nagakubo, Toshiaki Kobayashi(Japan Oil, Gas and
Metals National Corporation), Manabu Tanahashi(AIST),
Tetsuya Fujii(Japan Oil, Gas and Metals National Corporation)
|
Methane Hydrate Research Project Team |
| [Abstract] Understandings of seafloor manifestations
utilized by 3D seismic data around the Tenryu knolls in
the Nanki Trough |
|
|
| 11228 |
Development of X-ray CT coreflood system for high temperature
condition |
2nd International Workshop on X-Ray CT for GEOMATERIALS
- GeoX
2006/10/6 |
Hiroshi Okabe, Yoshihiro Tsuchiya, Kazuhito Oseto, Komei
Okatsu(Japan Oil, Gas and Metals National Corporation) |
Petroleum Engineering Research Team |
| [Abstract] In-situ saturation monitoring
with X-ray CT scanners for coreflood experiments gives
significant insights into understanding of the fluid flow
behaviour especially for heterogeneous rocks. Medical
X-ray CT scanners, however, have a limitation for high
temperature experiments since the temperature affects
the electrical circuit in the system. To overcome the
problem, the X-ray CT coreflood system with special heating
units has been developed for the experiments under high
temperature reservoir conditions. It consists of special
line and rubber heaters that accurately control the temperature
and does not affect in-situ monitoring. The system allows
us to measure petrophysical properties under reservoir
conditions including the use of live oil. Advantages of
the development for the use of the conventional medical
X-ray CT scanner are discussed. |
|
|
| 11223 |
Sequence Stratigraphy and Depositional Facies of the
Upper Kharaib Oil Reservoir, offshore Abu Dhabi |
17th International Sedimentological Congress
2006/8/28 |
Osamu Himeno(Japan Oil, Gas and Metals National Corporation),
Hidenori Obara(ZADCO), C.Robertson Handford(Strat-Search),
Koji Muramoto(JE Oil Exploration) |
Research Project Team on Subsurface Technologies for
Field Development |
[Abstract] Over the past decades, new technologies
for analyzing and visualizing reservoirs have emerged
and these have encouraged updating reservoir models. For
example, high-resolution sequence stratigraphy is increasingly
used as a methodology for providing more accurate reservoir
layering schemes and more realistic depositional facies
distribution that has not been depicted by litho- stratigraphic
correlation.
The study area is located approximately 80km northwest
of offshore Abu Dhabi. The areal extent of the reservoir
reaches 50x30km and a total oil column height of multi-layered
reservoirs is over 300m in thickness. In this giant reservoir,
heterogeneous water breakthrough has been observed from
some wells under the five-spot water injection pattern.
The Upper Kharaib reservoir, one of the main reservoir
in the field contains high permeability layers and these
layers might act as conduits of injected water [1]. It
has been difficult to predict the distribution of high
permeability layers because of reservoir heterogeneity.
To improve the understanding of non-uniform water injection
performances and to build a realistic geologic model,
it is essentially important to examine depositional facies
and stratigraphic architecture of the reservoir.
On the basis of detailed rock observation and sequence
stratigraphic interpretation for 23 cored-wells located
widely in the field, we defined 15 lithofacies and identified
five high-frequency (4th-5th order) depositional sequences
for the reservoir interval. Lithofacies were grouped into
following four major facies associations (FAs), which
generally occure in ascending order; Orbitolinid- dominated
FA, Lithocodium-dominated FA, Rudist-dominated FA and
Miliolid-dominated FA. General depositional environment
was interpreted as a leeward carbonate ramp setting gently
deepens towards west, extending from orbitolinid-dominated
outer ramp, storm-influenced Lithocodium banks in the
middle ramp, and inner ramp system with rudist shoals,
biostromes, and miliolid grain flats.
The five high-frequency depositional sequences (HFS1 to
5) framed by sequence boundaries (SB1 to 6) and maximum
flooding surfaces (MFS1 to 5) were identified as a result
of stacking pattern analysis (vertical transition in textures
and facies successions). These boundaries and surfaces
were correlated over the field including non-cored wells.
Accordingly, depositional models were constructed for
each systems tract based on combined interpretation of
core facies and isopach maps. High permeablity layers
commonly associated with Bacinella/Lithocodium rudstones
deposited under a strong influence of storms. These rudstone
layers, which pinch-out within four kms or less, were
interpreted to show channels or splay-like distributions
deposited in the localized topographic low area of a slight
sea floor fluctuation. |
|
|
| 11222 |
ASPHALTENE INDUCED FORMATION DAMAGE:
EFFECT OF ASPHALTENE PARTICLE SIZE AND CORE PERMEABILITY |
International Energy Agency Collaborative Project on
Enhanced oil Recovery
2006/9/21 |
S.S.K.Sim, D.Fisher(Alberta Research Council), Katsumo
Takabayashi, Komei Okatsu(Japan Oil, Gas and Metals National
Corporation) |
Petroleum Engineering Research Team |
[Abstract] The precipitation of asphaltene
during CO2 miscible flooding can lead to production losses
and reduced efficiencies. Having a clear understanding
of the asphaltene deposition mechanism can help the oil
industry to develop effective engineering practice to
minimize asphaltene deposition and develop treatment program
to restore well productivity. This paper presents results
of phase behavior and core flood tests conducted at reservoir
pressure and temperature conditions to identify the dominating
factors associated with permeability reduction during
CO2 miscible flood of a light oil reservoir.
Initially, dynamic phase behavior of crude oil and CO2
mixtures were investigated to determine the threshold
concentration of CO2 required to initiate asphaltene precipitation.
The relationship between CO2 concentration and the mass
of deposited asphaltene particles were quantified by analyzing
the images of the mixtures as well as by physical separation
of the deposited asphaltene solids. Laboratory core flood
tests were conducted to investigate the effect of asphaltene
deposition in reduction of core permeability. Variables
investigated included, initial core permeability, CO2
concentration and quantity and size of asphaltene particles
presence in the oil/CO2 mixtures. Porous media used included
sandpack, reservoir carbonate cores and commercial Indiana
limestones. The tests were conducted at 100 ℃ and 3000
psig with reservoir crude oil containing CO2 concentration
in the range of 40-70 mol%.
Phase behaviour results indicated that the mass and particles
size of asphaltene particles precipitated from the mixtures
was strongly dependent on the CO2 concentration. Core
flood test results showed that the severity of formation
damage was related to the initial core permeability as
well as the quantity and size of the asphaltene particles
precipitated. The damage mechanism was found analogous
to the 1/3 and 1/7 rule of thumb that relate the size
of particulates in injected water to potential permeability
reduction. It was also observed that formation damage
caused by shallow solid invasion was more readily removed
by crude oil injection while remediation of formation
damage caused by deep solid invasion, was more difficult. |
|
|
| 11221 |
Effects of pore structures on the fluid flow examined
by the lattice-Boltzmann method |
International Energy Agency Collaborative Project on
Enhanced Oil Recovery
2006/9/21 |
Hiroshi Okabe(Japan Oil, Gas and Metals National Corporation) |
Petroleum Engineering Research Team |
| [Abstract] Recent developments of the microtomography
and the pore-network model have been successful and brought
predictive capabilities for multiphase flow at the pore-scale.
However, some of the issues such as complicated pore structures
with heterogeneous wettability distributions in the mixed-wet
porous media, especially for carbonates, have not been
solved yet and the wettability distribution is still one
of the parameters that can significantly control the flow
behavior at the pore-scale. The lattice-Boltzmann method
(LBM) to simulate multiphase flow at the pore-scale is
used in the study in order to assess the effects of pore
structures on the fluid flows. The LBM provides a good
approximation to solutions of the Navier-Stokes equations
using a parallel and efficient algorithm that readily
accommodates complex boundaries such as porous media.
Simple and elemental structures such as divergent and
convergent flows are used to evaluate the relations between
pore structures and multiphase flows using the LBM. The
fundamental study at the simple pore structure can give
us the significant insight to implement the pore-network
model and to improve the understanding of fluid flow in
the reservoir. |
|
|
| 11220 |
High Pressure Air Injection into Light Oil Reservoirs:
Sensitivity Study for Vertical Sweep Performance |
International Energy Agency Collaborative Project on
Enhanced Oil Recovery
2006/9/22 |
Takeshi Onishi (Japan Oil, Gas and Metals National Corporation),
Hiroshi Uematsu(Teikoku Oil), Komei Okatsu (Japan Oil,
Gas and Metals National Corporation) |
Petroleum Engineering Research Team |
[Abstract] Recently, High Pressure Air Injection
(HPAI) to light oil reservoirs is considered to be an
effective EOR method. HPAI has some remarkable merits
as follows. (1) Injection gas source is air, which can
be supplied anywhere. (2) Initial and operation costs
are inexpensive because the main facility required is
only air compressor and air is free. (3) Air can be applied
even in low permeable reservoirs where water cannot be
injected. On the other hand, the evaluation method for
HPAI is quite difficult, because oxidation and combustion
reactions are complicated.
HPAI research mainly consists of experiments and numerical
simulation. A series of experiments is essential to evaluate
potential of HPAI in fields, such as Accelerating Rate
Calorimeter test, Thermo Gravimetric Pressurized Differential
Scanning Calorimeter test and Combustion Tube (CT) test.
Especially, CT test is important because the test is physical
simulation of HPAI. Numerical simulation is also important
to predict field production performance. The appropriate
reaction kinetics used in the simulation model has the
key to the expression of the real chemical reactions.
History matching with CT test is the only way to obtain
the kinetics. The good results have been already obtained
in history matching. The next step is field-scale simulation
using the kinetics obtained in the matching.
Field test of air injection is examined in a certain field.
The field has highly water saturated light oil reservoir,
because of strong water drive mechanism. High dip is also
existed. The actual data of field property is limited.
This paper describes numerical simulation study using
thermal simulator to investigate the sensitivity for vertical
sweep performance. The reservoir properties in the model
come from the field. The model has two dimensional and
field-scale grid size. The parameters to be investigated
are dip, perforation intervals of production well, permeability,
temperature of air injected and so forth.
Based on the results, it is concluded that some parameters
is critical and others are non-critical to the oil recovery.
The examples of results are shown as follows. When recoveries
from no dip and high dip reservoirs are compared, the
recovery is higher in the latter case. Production well
should be perforated only at lower zone to obtain higher
oil recovery. In addition, the ultimate oil recovery is
observed to be insensitive to the temperature of air injected. |
|
|
| 11217 |
Pore-scale heterogeneity assessed by the lattice-Boltzmann
method |
International Symposium of the Society of Core Analysis
2006/9/14 |
Hiroshi Okabe, Kazuhito Oseto(Japan Oil, Gas and Metals
National Corporation) |
Petroleum Engineering Research Team |
| [Abstract] A digital imaging technique is
used to characterize pore-scale structures and to predict
fluid flow at the scale. Heterogeneity at the pore-scale
can be assessed by the micro-Computed Tomography (micro-CT),
which provides complicated boundary conditions of porous
media, and it can also be identified by the numerical
flow simulation using the lattice-Boltzmann method (LBM)
on the digital image. Both the LBM and the digital image
are used to estimate the Representative Element Volume
(REV) of the rock. Different types and sizes of pore-scale
structures are evaluated in terms of the effects of heterogeneity
and the porosity-permeability correlations. Numerical
simulation on the digital image of porous media is useful
to understand its heterogeneity and such digital experiments
can add value to the laboratory measurements. |
|
|
| 11214 |
Hydrogen production by steam reforming of dimethyl ether
over single type copper alumina catalysts prepared by
a sol-gel method |
The 232nd ACS National Meeting
2006/9/13 |
Kaoru Takeishi(Shizuoka Univ.) |
Research Project Team on Emerging Gas Technologies |
[Abstract] Dimethyl ether (DME) is expected
as a clean fuel of the next generation. DME has recently
become a potential fuel for hydrogen production to be
used in fuel cells. There is possibility that DME infrastructures
will be settled more rapidly than hydrogen, because LPG
infrastructures existing are able to be used for DME.
I have developed Cu-Zn/Al2O3 catalysts prepared by a sol-gel
method for hydrogen production by DME steam reforming.
The catalysts produce hydrogen more effectively than mixed
catalysts with DME hydrolysis catalysts and methanol steam
reforming catalysts. SEM-EDS analyses have suggested that
the Cu-Zn/Al2O3 catalysts have the catalyst surface structure
that is appropriate for the steam reforming of DME consisting
of DME hydrolysis and methanol steam reforming. Experiments
on the effect of the space velocity, durability test,
and other experiments have suggested that the further
developments are still need but the catalysts have enough
capability for practical use. |
|
|
| 11212 |
Seismic facies-guided geomorphological analysis of submarine-fan
shape variation using 3D seismic data |
17th International Sedimentological Congress
2006/9/1 |
Osamu Takano, Mizue Nishimura, Ayato Kato, Tatsuo Saeki(Japan
Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] Seismic facies-guided geomorphological
analysis of submarine-fan shape variation using 3D seismic
data |
|
|
| 11211 |
Quaternary carbonates around the Ryukyu Islands - sedimentary
facies and sea level changes - |
17th International Sedimentological Congress
2006/8/30 |
Yoshihiro Tsuji(Japan Oil, Gas and Metals National Corporation),
Yasufumi Iryu(Tohoku Univ.), Kaoru Sugihara(Fukuoka Univ.),
Hiroki Matsuda(Kumamoto Univ.) |
Geology & Geophysics Research Team |
[Abstract] Quaternary carbonate deposits
comprising reefal and deeper water facies, occur around
the Ryukyu Islands, southwestern Japan. The reefs consist
of coralliferous limestone in which more than 100 species
of hermatypic corals are recognized, and deeper water
facies consist of rhodoliths and larger foraminifera limestones.
The contents of this short course will be
(1) Introductory lectures on present-day and Quaternary
carbonates around the Ryukyu Islands,
(2) Observations of marine sediments and core samples,
as well as thin sections, and
(3) Sedimentological analyses of the carbonate succession
and palaeontological examination of fossil assemblages
for reconstructing sea-level changes. This short course
is intended to provide a facies model applicable to Cenozoic. |
|
|
| 11210 |
230Th/234U and 14C dating of submerged coral reefs on
the insular shelf off Irabu Island, Ryukyus, southwestern
Japan |
17th International Sedimentological Congress
2006/8/28-29 |
Keiichi Sasaki(Kanazawa Gakuin Univ.), Akio Omura, Nobuyuki
Kuroiwa, Kenji Konishi(Kanazawa Univ.), Hiroki Matsuda(Kumamoto
Univ.)Yoshihiro Tsuji(Japan Oil, Gas and Metals National
Corporation) |
Geology & Geophysics Research Team |
[Abstract] The Technology Research Center,
Japan National Oil Corporation (JNOC-TRC: presently Technology
and Research Center, Japan Oil, Gas and Metals National
Corporation) surveyed detailed topography and surface
carbonate sediments and recovered four offshore drilling
cores in the insular shelf around Irabu Island, Southern
Ryukyus of Japan in a research project entitled ‘Techniques
for Reconstruction and Interpretation of Reservoir Developments.’
The insular shelf can be morphologically subdivided into
inner and outer shelves at about 50-55 m depth. Number
of pinnacles, ~1 km in diameter and 10-40 m in height,
are distributed in the inner shelf. Two drill cores, CR8
and 9, revealed these pinnacles to be submerged coral
reefs. We report lithology with fossil coral assemblages
and radiometric age data of these cores and discuss about
growth patterns of reefs responding to rapid sea level
rise since the last glacial maximum.
Cores were drilled at sites CR8 (24°43’23”N, 125°10’00”E;
-15.5 m) and CR9 (24°41’11”N, 125°07’11”E; -45.5 m). Holocene
reefal limestone, unconformably overlying Pleistocene
Ryukyu Group, occupied top of each pinnacle with 7.3 and
2.0 m in thickness at CR8 and 9, respectively. Holocene
sediments can be lithologically divided into two units
in both sites. Lithologic changes show similar pattern
in both sites, and indicate deepening-upward trend of
depositional environments.
Total of 20 corals of CR8 and 9 cores were dated by α-spectrometric
230Th/234U and liquid-scintillation 14C methods. Ages
and growth rates of lower units of CR8 and 9 were estimated
to be 8.9-7.9 ka with 4.3 m/kyr and 10.5-8.9 ka with 0.7
m/kyr, respectively. Upper units were deposited until
the present with low sedimentation rates, 0.4 and 0.1
m/kyr, in CR8 and 9. Both reefs show obvious change in
growth rates from the lower units to the upper. Increased
water depth of depositional environments and decreased
growth rates demonstrate that these submerged reefs were
drowned by rapid sea level rise during the last deglaciation
after deposition of reef frames dominated by shallow coral
species. Thus, Holocene transgressive systems tract is
represented by back-steppings of drowned reefs on topographic
highs beneath the inner shelf in this area. |
|
|
| 11209 |
Reservoir Properties and Depositional Facies of the
Upper Kharaib Carbonate Oil Reservoir, Offshore Abu Dhabi. |
17th International Sedimentological Congress
2006/8/28 |
Toshiaki Shibasaki, Tomohiro Obara(JODCO), Osamu Himeno(Japan
Oil, Gas and Metals National Corporation), Hidenori Obara(ZADCO) |
Research Project Team on Subsurface Technologies for
Field Development |
[Abstract] The upper Kharaib reservoir of
the Lower Cretaceous is one of the major oil-producing
horizons offshore Abu Dhabi in the United Arab Emirates.
The study field is located offshore Abu Dhabi of the Arabian
Gulf and the areal extent of the reservoir reaches 50x30kilometers.
This carbonate reservoir is characterized by heterogeneous
reservoir properties containing thin high permeability
layers. They have caused premature water breakthrough
that has been observed from some wells under five spot
water injection pattern. The preferential water movement
due to the reservoir heterogeneity has an impact on the
production performance and oil recovery. Therefore, reliable
permeability modeling is one of the major key issues.
Reservoir properties such as porosity and permeability
of carbonate rocks have been susceptible to depositional
environments and subsequent diagenesis, and, in general,
are more complicated than that of siliciclastic sedimentary
rocks. In addition, permeability prediction of carbonate
rocks from wire-line log data has not been achieved sufficiently
due to the resolution of log data and the complexity of
grain types and pore systems with primary and secondary
pore networks.
Therefore, it is important to identify the main geologic
controls on the reservoir properties and to construct
reservoir property models, e.g. porosity and permeability
models, from geologic concepts.
In this carbonate reservoir, depositional aspects, e.g.
texture, grain size and sorting, were important to characterize
the high permeability rock types [1]. In addition, the
grain types and their hardness have an impact on the reservoir
quality [2]. The grain types were also related with depositional
environments.
Based on the detailed core observation, thin section description
and sequence stratigraphic interpretation, a new layering
scheme and a series of facies distribution models were
constructed. Possible high permeability facies such as
Bacinella/ Lithocodium rudstones deposited under an influence
of storm condition were identified. This paper presents
the reservoir properties and geological factors in the
newly defined depositional facies. Then a workflow of
3D reservoir properties modeling from 3D depositional
models is proposed. |
|
|
| 11207 |
Concentration of Gas Hydrate in Sandy Sediments Relevant
to Subsurface Occurrence and Methane Accumulation |
17th International Sedimentological Congress
2006/8/27-9/1 |
Takashi Uchida, Amane Waseda(JAPEX), Takatoshi Namikawa(Japan
Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] Concentration of Gas Hydrate
in Sandy Sediments Relevant to Subsurface Occurrence and
Methane Accumulation |
|
|
| 11205 |
Organic Geochemistry of Gas Hydrates and Sediments in
the Eastern Nankai Trough, Japan |
17th International Sedimentological Congress
2006/8/27-9/1 |
Amane Waseda, Takashi Uchida(JAPEX), Takatoshi Namikawa(Japan
Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] Organic Geochemistry of Gas Hydrates
and Sediments The MH21 has, Japan |
|
|
| 11203 |
3D seismic interpretation of submarine fans in the shallow
structure beneath the sea floor in the northern part of
the Kumano basin, Japan |
17th International Sedimentological Congress
2006/8/27-9/1 |
Tatsuo Saeki, Takao Inamori(Japan Oil, Gas and Metals
National Corporation), Osamu Takano(JAPEX) |
Methane Hydrate Research Project Team |
[Abstract] Aiming commercialization of methane
hydrate production to be examined as future energy resources,
the Research Consortium for Methane Hydrate Resources
in Japan (MH21)has been executing the geological and geophysical
survey around the eastern Nankai Trough since 2001.
It is very important to delineate the distribution of
porous sediments, which can reserve a large amount of
gas-hydrates in the methane hydrates exploration as the
same as in the conventional petroleum exploration. In
offshore deep sea, it generally means that the delineation
of distributions of submarine-fan turbidite sand bodies
should be required. 3D seismic reflection data and visualization
software can be powerful tool to image and classify various
geological sedimentation patterns of submarine fans including
submarine channels and lobes.
Detailed 3D seismic interpretation was applied to the
northern pat of the Kumano basin, one portion of 3D seismic
survey areas around the eastern Nankai Trough. This article
introduces the interpreted structure shallower than about
200 mbsf among the full volume interpretation. |
|
|
| 11202 |
High-resolution seismic survey on the Quaternary sediment
off Amami-o shima Island, northern Ryukyu Island Arc,
Japan |
17th International Sedimentological Congress
2006/8/27-9/1 |
Kohsaku Arai(AIST), Hiroki Matsuda(Kumamoto Univ.),
Hideaki Machiyama(JAMSTEC), Yasufumi Iryu(Tohoku Univ.),
Yoshihiro Tsuji(Japan Oil, Gas and Metals National Corporation)
|
Geology & Geophysics Research Team |
| [Abstract] High-resolution single channel
seismic reflection surveys for the northern Ryukyu Island
Arc about 784 km suggested the existence of mound shape
reflections within the stratified sedimentary units considerable
to be “coral reefs” or banks with coarse- grained bioclasts.
The mound shape reflections overlie the acoustic basement
or stratified sediment and reach 15 m high and 400 m wide.
Some of them occurs uppermost of Quaternary sedimentary
unit. Onlapping reflection terminations are recognized
at upper boundary on the other one. Northern limit of
coral reef formation during lowstand age such as last
glacial maximum is discussed. |
|
|
| 11201 |
Pull-up anomalies of the BSR structure in the Kumano
Basin |
Western Pacific Geophysics Meeting
2006/7/24-27 |
Tatsuo Saeki, Takao Inamori(Japan Oil, Gas and Metals
National Corporation), Sadao Nagakubo(JDC), Sumito Morita(AIST) |
Methane Hydrate Research Project Team |
| [Abstract] Interpretation of 3D seismic
reflection data, which was acquired by METI (Ministry
of Economy, Trade and Industry of JAPAN) and reprocessed
by MH21 (the Research Consortium for Methane Hydrate Resources
in Japan), revealed the detailed BSR structure in the
northern rim of the Kumano basin around the eastern Nankai
trough, Japan. Conventionally, the BSR (bottom simulating
reflector), which is considered to be a bottom of the
gas hydrate bearing sediment, has been picked as the reflector
in parallel with sea-bottom topography. The interpreted
BSR in the Kumano basin include two types of local pull-up
phenomenon that had no correlation with the sea- bottom
topography. Strictly speaking, above pull-upped reflectors
should not be called as BSR because they do not simulate
the sea-bottom. However, detected anomalous events were
continuous with typical BSR reflectors around them. Most
remarkable BSR pull-up phenomena occurred in the small
circle area of 400m in diameter and the topography is
like a mountain. The center top was closed to the sea-bottom
in which the pock mark existed. Another type anomaly consisted
of several small pull-ups distributed in a line. Seismic
velocity analysis showed that there were local high velocity
anomalies directly above them, which could cause apparent
BSR pull-ups. The geological interpretation suggested
the possibility that above high velocities occurred due
to concentrations of gas hydrate. On the other hand, the
mountain type BSR pull-up might be related with the local
variation of the thermal condition. |
|
|
| 11214 |
Hydrogen production by steam reforming of dimethyl ether
over single type copper alumina catalysts prepared by a sol-gel method |
The 232nd ACS National Meeting
2006/9/13 |
Kaoru Takeishi(Shizuoka Univ.) |
Research Project Team on Emerging Gas Technologies |
[Abstract] Dimethyl ether (DME) is expected
as a clean fuel of the next generation. DME has recently
become a potential fuel for hydrogen production to be
used in fuel cells. There is possibility that DME infrastructures
will be settled more rapidly than hydrogen, because LPG
infrastructures existing are able to be used for DME.
I have developed Cu-Zn/Al2O3 catalysts prepared by a sol-gel
method for hydrogen production by DME steam reforming.
The catalysts produce hydrogen more effectively than mixed
catalysts with DME hydrolysis catalysts and methanol steam
reforming catalysts. SEM-EDS analyses have suggested that
the Cu-Zn/Al2O3 catalysts have the catalyst surface structure
that is appropriate for the steam reforming of DME consisting
of DME hydrolysis and methanol steam reforming. Experiments
on the effect of the space velocity, durability test,
and other experiments have suggested that the further
developments are still need but the catalysts have enough
capability for practical use. |
|
| 11198 |
Integrated Reservoir Modeling for Evaluating Field Development
0ptions in Agua Fria, Coapechaca and Tajin Fields of Chicontepec Basin |
SPE International Oil Conference and Exhibition
2006/8/31 |
Satoru Takahashi(Japan Oil, Gas and Metals National Corporation),
Maghsood Abbaszadeh(IPS), Kenji Ono(Japan Oil, Gas and Metals National Corporation),
Humberto Salazar Soto, Octavio Alcazar (PEMEX) |
Petroleum Engineering Research Team |
[Abstract] Chicontepec reservoir fields
are very complex turbidite deposits comprising of multiple
stack of turbidetic sequence events. Extreme heterogeneity
of rock fabric and pterophtycial properties occurs across
the fields both laterally and vertically. Describing this
geologic heterogeneity and building reservoir characterizations
models for subsequent reservoir flow models for field
development strategies and critical decision making is
a major undertaking challenge. We present a general methodology
of multivariate Gaussian for integrating various sources
of data at different scales to build geostatistical reservoir
characterization models for areas of Agua Fria, and Tajin
fields. These hierarchical high resolution models are
built directly at log-scale and honor rock facies distributions
and petrophysical properties of Vsh, porosity and water
saturation. Multiple seismic attribute data and geological
diagenesis information at sequence and subsequence scales
are integrated into these models to generate representative
reservoir descriptions.
Next, we use the constructed stochastic models to investigate
recovery performance of Chicontepec fields under primary,
waterflood and CO2-EOR technologies. Pilots of multi wells
in both Tajin and Agua Fria fields are considered for
this purpose. The final-scale geostatistical reservoir
characterization models are calibrated to dynamic production
performance data by history matching actual waterflood
pilot performance information in Agua Fria, and then used
as predictive tools for other field development scenarios.
The viability of the options of waterflooding very low
permeability and highly diagenized Tajin filed is investigated.
Tajin field contains huge reserves of oil left in place
because of loss of energy under primary depletion. The
large-scale pilot test models of Agua Fria investigate
an optimum and selective injection schemes into stacked
layers of turbidite deposits. Both Tajin and Agua Fria
pilots serve as a basis for evaluation and subsequent
implementation of CO2-EOR under a range on immiscible
and miscible injection practices. PVT and EOS analyses
for CO2 injection are provided for gauging. |
|
| 11188 |
Promoting effect of Co addition on catalytic partial
oxidation of methane at short contact time Over Rh/MgO
|
Chemical Communication (web) (Royal Society of Chemistry)
2006/7/31 |
Shigeru Kado, Seiji Naito, Takashi Hirose, Kimio Kunimori, Keiichi Tomishige(Tsukuba Univ.) |
Research Project Team on Emerging Gas Technologies |
| [Abstract] Addition of Co to 0.3 wt% Rh/MgO
remarkably enhanced activity and selectivity to CO and
H2 simultaneously in direct catalytic partial oxidation
of methane at the molar ratio of Co/Rh=1, where it is suggested
that the added of Co can be alloyed with Rh. |
|
| 11193 |
Delineation of gas hydrate-bearing sediments by multi
seismic attributes using 3D seismic survey in the Eastern
Nankai Trough area |
WPGM (Western Pacific Geophysics Meeting)
2006/7/24-27 |
Takao Inamori, Tatsuo Saeki(Japan Oil, Gas and Metals
National Corporation) |
Methane Hydrate Research Project Team |
[Abstract] Bottom Simulating Reflectors
(BSRs) were widely found on the marine seismic data acquired
offshore Japan, especially in the shelf-slope in the Eastern
Nankai Trough area. The occurrence of gas hydrate beneath
the sea floor had been indicated.
In 2000, the occurrence of gas hydrates was confirmed
by corings and borehole log measurements in the Eastern
Nankai Trough area. It gave us so big impact to the view
of Japanese future energy resources and other scientific
interests. METI, Ministry of Economy, Trade and Industry
of JAPAN, started ‘Japan's Methane Hydrate Exploitation
Program’ since the autumn of 2001.
We conducted the 3D seismic survey in this area in 2002,
we decided well sites and drilled thirty-two boreholes
in 2004. We had gotten several logs and cores which indicated
the occurrence of gas hydrate below the sea floor.
If we will explore and exploit the gas hydrate, we have
to get the information of hydrate-bearing sediments, such
as its concentration, porosity or thickness. BSRs indicate
the existence of gas hydrates. However, we cannot estimate
detail reservoir information from BSRs. In order to estimate
the amount of gas hydrates accurately, we need to get
the more detailed reservoir parameters from seismic data.
We apply the seismic attributes analysis to 3D seismic
survey data to delineate hydrate-bearing sediments.
We calculate seismic attributes of the P-interval velocity
using the NMO velocity analysis, P-impedance, S-impedance,
and Poisson's ratio change from pre-stack (AVO) analysis
and the attenuation. And we delineate of gas hydrate bearing-zones
at borehole locations. High P-interval velocity, High
P & S impedance, low Poisson’s ratio and high-attenuated
layers are corresponding to the hydrate bearing-zones.
There are several wells found over 30 m gas-hydrate sediments
in the Eastern Nankai Trough area. They correspond with high velocity zones.
We estimated the gas hydrate layers as high velocity zones. |
|
| 11192 |
Elastic Property of Gas Hydrate-bearing Zone |
WPGM (Western Pacific Geophysics Meeting)
2006/7/24-27 |
Masami Hato(Kyoto Univ.), Takao Inamori(Japan Oil, Gas and Metals
National Corporation), Yosuke Minami, Toshifumi Matsuoka (Kyoto Univ.) |
Methane Hydrate Research Project Team |
| [Abstract] In gas hydrate-bearing zone,
there are some unique phenomena on the seismic section,
such as blanking, source-frequency dependency of BSR appearance
and amplitude attenuation in inter-well tomography. The
sonic data acquired in the Nankai Trough area has shown
inhomogeneity and randomly-distributed velocity value
in the gas hydrate-bearing layers. Since the elastic properties
of gas hydrate-bearing zone have not modeled yet, we tried
to make detailed investigation of the well data for the
purpose of establishing velocity model in the gas hydrate-bearing
zone. In this study, based on the information of sonic
velocity, which is reciprocal value of delta-T of the
sonic, we set assumption that gas hydrate-bearing layer
has stochastic properties, which is described by von Karman
type autocorrelation, and the velocity is random distribution,
which can be described by bi-modal Gaussian distribution.
By separating the part of the sonic data along depth into
4 parts, non-hydrate unconsolidated sediment, gas hydrate-bearing
zone, low velocity (probably a small amount of free gas)
layer, and non-hydrate unconsolidated layer, the relation
of Vp/Vs to Vs is examined in detail. As a result, each
layer has specific Vp/Vs value, which shows the physical
characters are different and the gas hydrate has low Poisson’s
ratio. By defining the elastic velocities in each layer
with the constant density, we tried numerical elastic
simulation for synthetic seismogram generation. Then,
this result was compared with the real seismic data in
detail. The synthetic seismogram that is properly processed
to produce the stacked section shows BSR and the top of
gas hydrate-bearing zone clearly comparable to the seismic
data (stacked section). Through this research, the result
convinced us that the gas hydrate-bearing layer is inhomogeneous
random media. This knowledge may help to understand the
gas hydrate system and stratigraphic accumulation of gas
hydrate reservoir. |
|
| 11185 |
Recent progress of Japan's Methane Hydrates Exploitation
Program in the Nankai Trough, offshore central Japan |
WPGM (Western Pacific Geophysics Meeting)
2006/7/27 |
Kenichi Yokoi(Japan Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
[Abstract] Japan has been interested in
natural methane hydrate as a potential future energy source
and METI (Ministry of Economy, Trade and Industry) made
the program entitled "Japan's Methane Hydrate Exploitation
Program" in July 2001 to establish Japan as a world leader
in research in methane hydrates as an energy resource.
In order to obtain data for the understanding of methane
hydrate occurrence and reserves estimation in the Nankai
Trough, offshore Japan, the following surveys were carried
out in accordance with the program;
- 2D and 3D seismic surveys in 2001 and 2002
- Drilling of METI exploratory test wells "Tokai-oki to Kumanonada" in 2004
At present, Methane Hydrate Research Project Team of JOGMEC
(Japan Oil, Gas and Metals National Corporation) is executing
the evaluation study based on data by the above surveys. We
introduce outline of the surveys and the following information
on methane hydrates occurrence and its evaluation in the
Nankai Trough obtained by the surveys and study:
METI exploratory wells in 2004 confirmed most of methane
hydrates were concentrated in the pore space of turbidite
sandstone layer. The survey also suggested that BSR can
not used for the volume assessment of methane hydrates,
although it is an important indicator of existence of
methane hydrates. Detailed 3D seismic interpretation including
BSR interpretation, velocity analysis and geological information
may be necessary for the evaluation of methane hydrates. |
|
| 11183 |
Reconstruction of pore-space images using multiple-point statistics and direct imaging |
Flow & Transport In Permeable Media, Gordon Research Conference
2006/7/31 |
Hiroshi Okabe(Japan Oil, Gas and Metals National Corporation),
Martin J. Blunt (Imperial College London) |
Petroleum Engineering Research Team |
| [Abstract] We propose an integrated approach
to combine different types of image to reconstruct porous
media at the pore-scale. In order to generate geologically
realistic pore space images with appropriate connectivity,
particularly for carbonate rocks, direct images such as
microtomography and higher resolution images from thin-sections
are used. 2D thin-sections provide multiple-point statistics
(MPS), which describe the statistical relation between
multiple spatial locations and their statistics can be
used to generate 3D images at higher resolution. The reconstruction
using multiple-point statistics allows the connectivity
of the void space to be reproduced accurately. The statistically
reconstructed images are then combined with the images
measured by the microtomography to generate a realistic
pore structure since some 2D thin-sections may miss macro-porosity
due to their size. The integrated method is tested on
carbonates for which 3D images of larger vug porosity
are captured, while 2D thin sections accurately characterize
small-scale structure. The integrated images have permeabilities
computed using the lattice-Boltzmann method (LBM) that
are similar to laboratory-measured values, which indicates
that the proposed method is both practical and realistic.
|
|
| 11181 |
Catalysts for Hydrogen Production by Steam Reforming of Dimethyl Ether |
16th International Symposium on Fine Chemistry and Functional
Polymers (FCFP-XVI) & IUPAC 2nd International Symposium
on Novel Materials and Synthesis (NMS-II)
2006/7/27 |
Kaoru Takeishi(Shizuoka Univ.) |
Research Project Team on Emerging Gas Technologies |
[Abstract] Dimethyl ether (DME) is expected
as one of clean fuels, and DME is one of substitutes of
diesel fuels and LPG. Steam reforming of DME over Cu-Zn/Al2O3
catalysts prepared by the sol-gel method was investigated.
Results of SEM-EDS analysis of the Cu-Zn/Al2O3 catalyst
prepared by the sol-gel method suggested that alumina
working for DME hydrolysis and copper working for methanol
steam reforming are co-existing. The two reactions will
occur more sequentially than the mixed catalysts of DME
hydrolysis catalysts and methanol steam reforming catalysts.
Reaction results suggested that Cu-Zn/Al2O3 catalysts
prepared by the sol-gel method have high activity for
hydrogen production and long catalyst life.
It is found that the Cu-Zn/Al2O3 catalyst prepared by
the sol-gel method has the catalyst surface structure
that is appropriate for the steam reforming of DME consisting
of DME hydrolysis and methanol steam reforming. The further
development is still need, but the catalyst has enough
capability for practical use. |
|
| 11178 |
Methane Accumulation Forming High Concentration of Gas Hydrate in Sandy Sediments |
WPGM (Western Pacific Geophysics Meeting)
2006/7/24-27 |
Takashi Uchida, Amane Waseda(JAPEX), Takatoshi Namikawa(Japan Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] Methane Accumulation Forming High
Concentration of Gas Hydrate in Sandy Sediments |
|
| 11177 |
Proppant fracturing vs. acid frac Middle East Study (emphasis on rock properties) |
SPE APPLIED TECHNOLOGY WORKSHOP MATRIX STIMULATION
2005/11/2 |
Mitsuo Tamura(Japan Oil, Gas and Metals National Corporation) |
Research Project Team on Subsurface Technologies for Field Development |
| [Abstract] As the target to enhance oil
recovery from a low permeable Carbonate reservoir in the
Middle East, CO2 gas injection study for EOR by reservoir
engineering have been carried out. Besides, it is imperative
to investigate if well drilling and completion technologies
can contribute in assisting maximize economic oil recovery
where either hydraulic or acid fracturing in a horizontal
hole is one of attractive options. A study was commenced
at the last year and was separated into two phases. In
Phase 1, to evaluate the effectiveness of fracturing in
a horizontal hole and to find a best practice, we conducted
Data review of past acid fracturing operations in deviated
wells, Geomechanics analysis, Screening of available practices,
Propagation simulation and Reservoir simulation. As the
result, the fracturing in horizontal hole would be feasible
and worth to conduct a pilot test. Currently on the way
in Phase 2, we will carry out acid reaction tests to evaluate
which either acid fracturing or hydraulic fracturing is
economically more effective, select a candidate well and
design a detailed fracturing job program with considering
well design (casing / completion) and monitoring procedures.
|
|
| 11163 |
Development of a Highly-Active DME Steam Reforming Catalyst and Reforming System for Fuel Cell |
Second International DME Conference
2006/5/15-17 |
Tetsuya Takemoto(Osaka Gas), Naohiko Matsuda(Mitsubishi
Heavy Industries), Hiroshi Hashimoto(JGC), Kengo Tsukahara(MitsubishiGas
Chemical), Osamu Okada(Renaissance Energy Research Corporation),
Shinichi Suzuki(Japan Oil, Gas and Metals National Corporation)
|
Research Project Team on Emerging Gas Technologies |
[Abstract] DME has a merit to make reforming
temperature lower, and cut desulfurization. We have developed
a highly-active DME steam reforming catalyst with high
activities of DME hydrolysis and methanol steam reforming.
The addition of a certain kind of alumina to a Cu-Zn catalyst
improved the steam reforming performance of DME. Complete
DME conversion was attained below 350℃ over the optimized
composite catalyst. We have also been developed the 1kW
stationary DME-fueled fuel cell system and it was demonstrated
for 100hr. And now we are developing the DME reforming
System for fuel cell vehicles. Using these catalysts,
we have developed two types of reformer, one is inner
heated type equal to 30kWe and other is outer heated one
equal to 5kWe.
We have evaluated compactness of reformer by inner heated
type and higher efficiency by outer heated type. In 30kW
system, we have packed a reformer under 50 litters, considering
the space under car sheets. The average temperature of
our two DME reformers is under 450C. So we can reduce
the size of reformer by using thin thermal isolation.
After manufacturing test reformers, we have tested the
quality reformed gas and the gas producing stability of
reformer by 30kWe fuel cell. By the test of startup, load
change and stopping, we have been evaluating the running
performance of DME reformer in FCV.
At the same time, we have estimated total weight and total
energy efficiency of DME reforming system in comparison
with other supply systems for FCV. |
|
| 11162 |
PERMEABILITY ESTIMATES IN GAS HYDRATE RESERVOIRS OF THE NANKAI TROUGH |
2007 SPWLA Annual Symposium
2006/6/4-7 |
D.Murray, Masafumi Fukuhara, Chee Kin Khong(Schlumberger),
Takatoshi Namikawa, Koji Yamamoto(Japan Oil, Gas and Metals
National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] PERMEABILITY ESTIMATES IN GAS HYDRATE RESERVOIRS OF THE NANKAI TROUGH |
|
| 11143 |
RECONSTRUCTION OF PORE-SPACE IMAGES USING MICROTOMOGRAPHY AND MULTIPLE-POINT STATISTICS |
CMWR XVI - Computational Methods in Water Resources -XVI International Conference
2006/6/19 |
Hiroshi Okabe(Japan Oil, Gas and Metals National Corporation),
Martin J. Blunt (Imperial College London) |
Petroleum Engineering Research Team |
| [Abstract] Quantitative prediction of petrophysical
properties for reservoir rocks frequently employs representative
microscopic models of the pore space as input. Recently
digital imaging techniques such as microtomography have
been used to provide void space images at the resolution
of a few microns. However, this resolution may be insufficient
to capture some smaller structures, particularly in carbonates.
An emerging destructive focused ion beam method can provide
better resolution but only on very small samples. Two-dimensional
(2D) thin sections, in contrast, are easily available
and they can image micro-porosity. However, they do not
directly capture the three-dimensional (3D) pore space.
We propose an integrated approach to combine different
types of image to reconstruct porous media. In order to
generate geologically realistic pore space images with
appropriate connectivity, particularly for carbonate rocks,
relatively low resolution microtomography and higher resolution
images from thin-sections are used. 2D thin-sections provide
multiple-point statistics (MPS), which describe the statistical
relation between multiple spatial locations and their
statistics can be used to generate 3D images at higher
resolution. The reconstruction using multiple-point statistics
allows the connectivity of the void space to be reproduced
accurately. The statistically reconstructed images are
then combined with the images measured by the microtomography
to generate a realistic pore structure since some 2D thin-sections
may miss macro-porosity due to their size. The integrated
method is tested on carbonates for which 3D images of
larger vug porosity are captured, while 2D thin sections
accurately characterize small-scale structure. The integrated
images have permeabilities computed using the lattice-Boltzmann
method (LBM) that are similar to laboratory-measured values,
which indicates that the proposed method is both practical and realistic. |
|
| 11141 |
Air Injection EOR in highly water saturated light-oil reservoir |
68th EAGE Conference & Exhibition incorporating SPE Europec 200
2006/6/15 |
Tetsuo Teramoto, Hiroshi Uematsu, Katsumo Takabayashi(TEIKOKU
OIL), Takeshi Onishi(Japan Oil, Gas and Metals National Corporation) |
Petroleum Engineering Research Team |
| [Abstract] Air Injection EOR in highly water saturated light-oil reservoir |
|
|
| 11130 |
Properties of Oil Sands and Bitumen in Athabasca |
CSPG (The Canadian Society of Petroleum Geologists),
CSEG (the Canadian Society of Exploration Geophysicists),
CWLS (the Canadian Well Logging Society) Joint Convention
2006/5/15-16 |
Hisako Mochinaga, Shigenobu Onozuka, Fumio Kono, Toyokazu
Ogawa(Japan Oil, Gas and Metals National Corporation),
Akihisa Takahashi, Takahiro Torigoe(JAPEX) |
Geology and Geophysics Team |
[Abstract] SAGD (Steam Assisted Gravity
Drainage) is one of the most effective methods to produce
bitumen by reducing viscosity. To monitor the steam front
is very crucial for the operation of SAGD. In time-lapse
seismic analysis, amplitude change caused by decrease
in velocity and density would estimate the location of
steam front. So we measured physical properties of oil
sands and bitumen under reservoir conditions through SAGD
operations.
From our ultrasonic measurements, it is confirmed that
P- and S- wave velocities of oil sands and bitumen have
strongly temperature dependence and relatively weak pressure
dependence in the SAGD operation range. It is also confirmed
the strong temperature dependence of bitumen density and
viscosity. Between 20°C to 50°C, velocities of oil sands
decrease nonlinearly due to the phase transition of bitumen.
In the condition, bitumen should have some shear velocity
as a quasi-solid.
We simulated oil sand velocities using Gassmann’s equation
as well. The Fluid modulus is based on the measured bitumen
velocity and brine velocity calculated by FLAG program.
The calculation based on the Walton contact model agreed
with the measured data at the low temperature, which also
coincides with the logging data. The model explained well
that the water-wet sands maintain a rim of water around grains.
For seismic monitoring, acoustic impedance is considered
as a useful parameter for identifying the steam front.
Since bitumen has shear wave component below 40°C, the
decrease in Vp/Vs ratio is not so valid to know if the
pressure changes. On the other hand, acoustic impedance
tells the change in reservoir conditions during SAGD operation.
Through this study, we consider that we can acknowledge
the water saturation effect on velocities as well as the
frequency dependence of the physical properties. |
|
|
| 11121 |
Japan drills, logs gas hydrate wells in the Nankai Trough |
Oil and Gas Journal
2005/9/12
|
Hideaki Takahashi(JAPEX), Yoshihiro Tsuji(Japan Oil,
Gas and Metals National Corporation) |
Geology & Geophysics Research Team |
| [Abstract] Japan drills, logs gas hydrate wells in the Nankai Trough |
|
|
| 11120 |
Japan explores for hydrates in the Nankai Trough |
Oil and Gas Journal
2005/9/5
|
Hideaki Takahashi(JAPEX), Yoshihiro Tsuji(Japan Oil,
Gas and Metals National Corporation) |
Geology & Geophysics Research Team |
| [Abstract] Japan explores for hydrates in the Nankai Trough |
|
|
| 11117 |
Multi-Well Exploration Program in 2004 for Natural Hydrate
in the Nankai-Trough Offshore Japan |
OTC2005(Offshore Technology Conference
2005/5/2-5 |
Hideaki Takahashi(JAPEX), Yoshihiro Tsuji |
Methane Hydrate Research Project Team |
| [Abstract] For the purpose of evaluating
methane hydrate occurrence offshore central Japan, 32
wells were drilled through the BSR (Bottom Simulating
Reflector) horizon at the water depth of 720 m to 2,033
m over a 122-day period from January 2004 to May 2004.
This was the second methane hydrate exploration campaign
in the Nankai-Trough as a national project led by Ministry
of Economy, Trade and Industry(METI, re-structured from
MITI (Ministry of International Trade and Industry) in
2001) to seek a new energy source, based on the technologies
developed through the first campaign of 1999-2000 1. It
was organized by Japan National Oil Corporation (JNOC,
re-structured to JOGMEC (Oil, Gas and Metals National
Corporation) in 2004) in collaboration with Japan Petroleum
Exploration Co., Ltd. (JAPEX) as the drilling operator
and with Teikoku Oil Co., Ltd. (TOC). Sixteen (16) wells
were LWD-logged and two of them were installed with the
high accuracy bore hole temperature sensors, 2 wells were
wireline-logged, 12 wells were cored, and 2 wells were
cased and experimented to verify technologies for the
future possible stage including 1 horizontal well. All
scheduled programs were performed successfully with a
deepwater research vessel the "JOIDES Resolution" operated
by Transocean. This paper introduces its general program. |
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| 11107 |
DME Utilization R&D Activities Supported by JOGMEC Program in Japan |
2nd International DME Conference
2006/5/17 |
Shinichi Suzuki(Japan Oil, Gas and Metals National Corporation) |
Research Project Team on Emerging Gas Technologies |
[Abstract] DME is highlighted in the view
of the diversification of energy, decrease of dependence
on oil and environment friendliness. DME is called as
'multi-source and multi-purpose' product, because it can
be produced from various feedstock containing hydrogen
and carbon such as natural gas, oil, coal, biomass, and
so on and it can be utilized as a fuel for the centralized
and distributed power generations, vehicles as an alternative
of diesel oil, home use as an alternative of LPG, feedstock
of hydrogen production for fuel cell and chemical production,
and so forth. DME has wider potential use application
than GTL and its production process is simpler and more
efficient in energy and carbon compared to GTL one. However,
in order to make DME prevail in public, there are higher
hurdles in infrastructure and utilization technologies.
In Japan, under the support of the Japanese government,
R&D related to DME production, infrastructure and utilization
has being carried out and the law, regulation, standardization
for safety, distribution and use have being made. JOGMEC,
as a governmental agency, has been financially supporting
the R&D of DME utilization by the Japanese private companies
since 2001. Total of 17 themes have been supported ranging
from a fuel use for power generation and a feedstock for
chemical production until now.
In the present, DME reforming technology for the fuel
cell vehicle and chemical production process from DME
are being tackled. Following the efforts to develop the
DME utilization technologies by the companies under the
JOGMEC program, the power generation with turbine and
boiler, engine and SNG production using DME are almost
ready for commercial use. As for the DME vehicle, the
improvement of performance by much more fleet tests and
the development of the related infrastructure technologies
should be needed. As for the DME reforming technologies
for the stationary fuel cell, it is hoped to confirm and
improve the reforming system by implementing the longer
catalysts life test and so forth in the near future. |
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| 11104 |
Delinetion of methane hydrate-bearing zone using seismic attributes analysis |
The Leading Edge (The Society of Exploration Geophysicists )
2006/5 |
Masami Hato, Toshifumi Matsuoka(Kyoto University), Takao Inamori,
Tatsuo Saeki(Japan Oil, Gas and Metals National Corporation) |
Methane Hydrate Research Project Team |
| [Abstract] Delinetion of methane hydrate-bearing
zone using seismic attributes analysis |
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